Meaning

adjective resembling glass in smoothness and shininess and slickness; ; - Willa Cather

adjective (used of eyes) lacking liveliness

adjective (of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it

originFrom Middle English glasy, equivalent to glass + -y. Compare Saterland Frisian glääsich (“glassy”), Dutch glazig (“glassy”), German Low German glasig (“glassy”), German glasig (“glassy”).

Etymology from Wiktionary, CC BY-SA 3.0